Which leaves me with two more questions. 1) where is the text field where I enter in the apps that I want to recieve reviews about
2) why don't you turn this into an app? Why is it a web/e-mail solution?
We all have so much e-mail already, you could simply create an app, the app user gets a unique ID, you go scraping and when you find new reviews, you send a notification and the person can then see them.
Furthermore, you should be able to do some metrics on "people who are getting reviews on x app are also getting reviews on y app, which may help companies stay up on new competitors.